The parts are simply high-quality workmanship, function perfectly and see our range of even good. And those who informed on the manufacturer's website, notes that the strips are produced not only in Germany but also have a 10 year warranty. I hope that too many years to come. The cheaper bars from the same manufacturer, however, are only engineered in Germany.
If so sporadically customers report short life, where is the problem, send it back and get a replacement.
We will continue to buy only those strips!